168results about How to "Friendly production environment" patented technology

The invention discloses a clean production process for a polyurethane synthetic leather base with ultramicro leather powder as a filling material. The process comprises the following steps: introducing air and water-based finishing slurry blended with ultramicro leather powder into a mixer according to a certain proportion and allowing a high-quality micro-foaming finishing agent to be formed under high-speed dispersion action of a stirring head; and coating the micro-foaming finishing agent and then drying and curing the micro-foaming finishing agent so as to prepare the synthetic leather base. The method provided by the invention has the advantages of simple preparation, easy control and the like, eliminates pollution of dimethyl formamide (DMF) produced in a wet production method for synthetic leather and reduces pollution of the industry of synthetic leather; and introduction of the natural ultramicro leather powder enables moisture and air permeability of polyurethane synthetic leather to be improved.

The invention relates to fluoride-free low-acid zwitterion quartz sand reverse flotation process, which is characterized by comprising following steps: (1) pretreatment; (2) flotation: adjusting the pH (potential of hydrogen) value of ore pulp to 4-5 by sulfuric acid, performing air agitation, adding 40g/t-80g/t of positive ion collecting agent and 60g/t-75g/t of foaming agent, stirring and removing foams in primary flotation; and adjusting the pH value of the ore pulp to 9-10 by 200g/t-300g/t of sodium carbonate, performing air agitation, adding 80g/t-150g/t of negative ion collecting agent,then adding 60g/t-75g/t of foaming agent, stirring and removing foams in secondary floatation; and (3) washing ores in a flotation tank by water until the ores are neutral, and drying the ores to obtain quartz sand concentrates. The flotation collecting agents are fine in selectivity, the process is simple, cost is low, the purity of the quartz sand is high, the content of iron and aluminum impurities is low, and the problem that traditional fluoride and high-acid process damages equipment and environments is avoided in a flotation process.

The invention provides a starch coating material and application thereof in coated sustained/controlled release fertilizers. The coating material comprises starch, cellulose, humic acid and a crosslinking agent, wherein the starch accounts for 90.0-95.0% of the coating material by mass; the cellulose accounts for 0-10.0% (except 0) of the coating material by mass; the humic acid accounts for 0-10.0% (except 0) of the coating material by mass; and the crosslinking agent accounts for 0.2-5.0% of the coating material by mass. The starch coating material is used as the coating of the coated sustained/controlled release fertilizers and the coating accounts for 2-30% of the coated sustained/controlled release fertilizers by mass. The coating material has good coating forming property and water resistance and is degradable. Production and application of the material are environment-friendly. The sustained/controlled release fertilizers in different release periods can be prepared by adjusting the proportion of the components of the coating material to the coating material to the granular fertilizers. When the sustained/controlled release fertilizers are prepared by the invention, the used raw materials have wide sources and are cheap and easy to obtain. The preparation method is simple and prone to industrial production.

The invention relates to a process for recovering zinc from hot-dip coating zinc ash. The process comprises the following steps of: separating the hot-dip coating zinc ash after dry grinding and screening to obtain an oversize product and an undersize product; removing bound water and a small amount of zinc chloride from the oversize product under the condition that the temperature is between 400 and 500 DEG C and the vacuum degree is 10 to 50 Pa; performing vacuum distillation on the oversize product under the condition that the temperature is between 650 and 800 DEG C and the vacuum degree is 10 to 30 Pa to obtain zinc; and performing alkali cleaning on the undersize product to remove chlorine, and then performing vacuum thermal reduction on the undersize product to obtain the zinc from zinc oxide by using ferrosilicon as a reducing agent and calcium oxide as a slagging agent under the condition that the vacuum degree is 10 to 30 Pa and the temperature is between 1,050 and 1,200 DEG C. The process has a high recovery rate for recovering the zinc from the hot-dip coating zinc ash, and the obtained zinc has a good crystallized shape.

The invention belongs to the technical field of preparation of novel materials and relates to a method for preparing a nano black carbon passivator for repairing heavy metal contaminated soil. The method comprises the following steps of: weighing nano black carbon raw materials and putting the raw materials in a glass container, adding HNO3 and KMnO4, uniformly mixing so as to obtain a mixed oxidant, putting the nano black carbon and the mixed oxidant in a ventilating kitchen, and standing at room temperature so as to obtain the pre-oxidized nano black carbon; heating the pre-oxidized nano black carbon by utilizing a constant temperature water bath kettle, thus obtaining the oxidized nano black carbon; centrifuging the oxidized nano black carbon in a centrifugal machine, and pouring the supernatant; adding distilled water, and repeatedly centrifuging until the pH value of the centrifuged supernatant is more than 5.5, thus obtaining the washed modified nano black carbon; and controlling the temperature of the washed modified nano black carbon to be 105 DEG C, and drying in a dryer, thus obtaining the product. The method is simple in process principle, low in preparation cost, high in product quality, environment-friendly in production, high in economic benefits, wide in product application range and good in a using effect.

The invention discloses a method for recycling valuable metal in a waste circuit board. The method includes the following steps that the waste circuit board is subject to smashing and reselection to prepare multi-metal powder; a dilute acid solution is added into the multi-metal powder, agitation leaching is carried out, filtering is carried out, and leaching slag I and leaching liquid I are obtained; an acid solution is added into the leaching slag I according to the liquid-solid mass ratio of the acid solution to the leaching slag I being 10-40:1, then an oxidizing agent is added, agitation leaching is carried out, filtering is carried out after leaching is finished, and leaching slag II and leaching liquid II are obtained; the leaching liquid II is subject to cyclone electrodeposition to obtain cathode copper and an after-electrolysis solution; alkali and a reducing agent are added into the leaching slag II, smelting is carried out under the condition that the temperature ranges from 400 DEG C to 600 DEG C, water leaching is carried out, filtering is carried out, and lead bullion containing precious metal and leaching liquid III are obtained; and the leaching liquid III is purified and is subject to evaporation and concentration to obtain a concentrated alkali solution and sodium stannate crystals. According to the method for recycling the valuable metal in the waste circuit board, the procedure is short, the efficiency is high, the cost is low, cleanness is achieved, and pollution is avoided.

The invention discloses a Hong Anzhang seedling growing method. Before cutting, female parents are disinfected, deinsectization is conducted, strong upper branches are taken as cutting slips. The cutting slips are trimmed into the shape with the length of 6-10 cm and the diameter of 0.3-0.5 cm, the bottoms of the cutting slips are cut flatly, more than half of strong leaves are reserved on the tops, and after soaked for a few seconds for disinfection, the cutting slips are quickly wet with paste prepared from rooting powder. Sticky deep-layer red earth is selected; on a cloudy day or in the morning, the cutting slips are subjected to cutting in a 9*11 non-woven fabric seedling growing bag with cuttage soil; after cutting, the Hong Anzhang cutting slips are disinfected again, an arch plastic-coated steel tube is used for arch making, water-absorption thick non-woven fabric strips are additionally arranged, anti-drop film covers the fabric strips for sealing, a sunshelter is constructedoutside the arch, an overshadowing net with the overshadowing rate of 95% covers the sunshelter, and a monopotassium phosphate solution or a leaf fertilizer which contains bactericide and can promoterooting is sprayed every 10 days. The seedling growing method of cutting propagation is adopted for conducting propagation on Hong Anzhang nursery stocks of the superior type and has the advantagesofquick propagation speed, high germchit purity and high survival rate.

The invention relates to a method for preparing potassium fluoride with white carbon black as co-product by using fluorosilicic acid as a raw material. The method comprises the following steps: S1 dissolving potassium chloride and filtering to obtain potassium chloride solution; S2, injecting the potassium chloride solution obtained by S1 into the fluorosilicic acid solution for reaction, and after the reaction is completed, stirring, filtering and washing to obtain the potassium fluorosilicate filter cake; S3, adding water in proportion to the potassium fluosilicate filter cake obtained in the step S2 and stirring into a paste to obtain potassium fluosilicate slurry, and then injecting potassium hydroxide solution into the slurry to carry out reaction; S4, after the reaction is completed,filtering the mixed slurry obtained in the step S3 to obtain a silica filter cake and a filtrate containing potassium fluoride. The invention uses fluorosilicic acid as a raw material to prepare potassium fluoride with white carbon black as co-product, and the by-product potassium chloride and by-product silicofluoric acid from hydrofluoric acid industry are used as main raw materials to preparehigh purity potassium fluoride with high added value white carbon black as co-product. Compared with the raw materials in the neutralization method in which potassium hydroxide and hydrofluoric acid are reacted are used for the longest time at present, the production cost of the method is low.

The invention relates to a soft crystallitic wax combination containing crystallitic wax as the substrate, malthene and tackifier. The soft crystallitic wax combination disclosed in the invention has reduced rigidity and enhanced viscosity, and adjusts the product properties according to needs. Being capable of effectively overcoming the defects of the common crystallitic wax such as weak toughness and easy breakage, etc., the crystallitic wax composite relating to the invention is in particular suitable for the fields of moisture protection, insulation, sealing and gift candles, etc.

The invention discloses a lutein micro-capsule preparation, which adopts lutein as core material, adopts granulesten and sucrose ester as composite emulsifying agent and adopts gelatin and porous starch as composite wall material. The invention further discloses a preparation method id the lutein micro-capsule preparation. The lutein micro-capsule is obviously improved in water-solubility and stability, is high in bioactivity, and has more than 60% clearance rate on OH- and O2.-. Compared with free lutein the lutein micro-capsule can be directly dissolved in water, heat resistance and acid-base resistance are respectively improved by 50%, and illumination and oxygen resistance capability are respectively by 37% and 20%. Under the conditions of 100DEG C high temperature, 70% oxygen, high potential of hydrogen (PH1-PH12) and long-term illumination (reaching 30 days), retention rate of the lutein can still be maintained to more than 90%.

The invention belongs to the technical field of air conditioners, and relates to an efficient and energy-saving temperature-regulating and humidity-regulating air processing method. According to the method, each cycle of four subsystems is filled with cycle medium after pumped out, and the four subsystems include an inside-outside combined-type gas-liquid two-phase flow heat pipe cold quantity recovery subsystem, a multi-stage shunt-wound refrigeration cycle subsystem, an inside-outside combined-type heat-extraction heat pump cycle subsystem and an inside-outside combined-type heat-extraction-free heat pump cycle subsystem; both air-out temperature and dew-point temperature of a central control subsystem are set according to a temperature-regulating and humidity-regulating air processing technology; and all compressors of the multi-stage shunt-wound refrigeration cycle subsystem are started after an induced-draft fan in an air post-processing section is started, and the inside-outside combined-type gas-liquid two-phase flow heat pipe cold quantity recovery subsystem is started, as a result, the air-out temperature and the dew-point temperature of the system reaches the set value, and the stable operation of the system is realized; and accordingly, in such a way, the air meeting the requirement of the air-out temperature and the dew-point temperature can be continuously provided. The system device has the advantages of simple structure, reliable principle, low running cost, good energy saving effect, friendly production environment, and remarkable economic benefit.

The invention provides a method for preparing an absorbable and antibacterial guided tissue regeneration membrane for a bone-like structure, and belongs to the field of biological medical materials. The method comprises the following steps: firstly, preparing a cell free bovine pericardial collagen fiber membrane by adopting a repeated freeze-thaw method and a surface active agent TritonX-100, or preparing a demineralized cell free collagen fiber membrane of a cattle lamellar bone by using a method of EDTA decalcification by using the surfactant TritonX-100; treating by using sodium trimetaphosphate to obtain a phosphorylated collagen fiber membrane; with the assistance of a direct-current electric field, mineralizing in agar hydrogel containing calcium and phosphate, thereby obtaining a mineralized collagen membrane with a bone-like structure with certain hardness; and finally soaking the mineralized collagen membrane into a minocyline solution, and preparing an antibacterial bone-like structured composite membrane structure by virtue of the characteristics of combined minocyline and hydroxyapatite. The guided tissue regeneration membrane provided by the invention has a bone-like structure, is capable of maintaining a bone defect space, is good in operation forming property and antibacterial property, and can be applied to clinical practice for bone defect remediation and reconstruction in periodontal departments, dental implant mediation and occlusalf surfaces.

The invention relates to a technology for recovering nickel, cobalt and iron from nickel oxide ores through high-temperature chlorinating volatilization. The technology comprises the following steps: A, respectively pulverizing and ball-milling the nickel oxide ores and coke powder; B, uniformly mixing the nickel oxide ores, the coke powder and a chlorinating agent to carry out high-temperature chlorinating volatilization roasting, converting chlorinated nickel, cobalt and iron into gas at a high temperature, filling smoke, and in a recovering device, washing with water, absorbing and dissolving a smoke chloride solution; C, producing an oxyhydrogen mixture product containing nickel, cobalt and iron. The nickel grade of the oxyhydrogen mixture product containing nickel, cobalt and iron, produced by the invention, is high and can be used for producing stainless steel. Compared with the traditional nickel oxide ore wet-process treatment technology, the method for recovering nickel, cobalt and iron from nickel oxide ores belongs to the technology having the advantages of high resource comprehensive utilization rate, low energy consumption, environment friendliness and easiness for implementation.

The invention belongs to the technical field of processing of marine products, and relates to a preparation method of specially-made sea cucumber powder. The preparation method comprises six steps, including treatment of fresh sea cucumbers, preparation of traditional Chinese medicine components, decoction of yellow wine medicine soup, soaking of the sea cucumbers, freeze-drying of specially-made sea cucumbers and low-temperature crushing: firstly, treating the fresh sea cucumbers for later use, and soaking the sea cucumbers in a deodorizing solution prepared from a ferment solution for deodorization; secondly, weighting, mixing and batching the traditional Chinese medicine components by weight, decocting with yellow wine to form the yellow wine medicine soup, and subsequently putting the deodorized sea cucumbers into the yellow wine medicine soup for special preparation; finally freeze-drying the specially-made sea cucumbers into a dried product, and then crushing the dried product into powder by using a low-temperature crusher to prepare a specially-made sea cucumber powder finished product. The specially-made sea cucumber powder is mixed with warm boiling water for drinking. The preparation method of the specially-made sea cucumber powder is mature in process route, equipment is easy to get, the product is rich in nutrients and remarkable in health care and health maintenance effects, the cost is lowered, effective utilization of resources is guaranteed, the specially-made sea cucumber powder is convenient to eat, and the production is environment-friendly.

The invention relates to a preparation method of (S)-equol, which aims to solve the problem of complex operation in the existing preparation method of (S)-equol. The preparation method comprises the following steps: by using daidzein as the main material, carrying out hydroxy protection, catalytic hydrogenation, dehydration and chiral catalytic reduction to prepare the (S)-equol. The invention has the advantages of cheap and accessible raw materials and low cost, is simple to operate, and is suitable for industrial scale-up production; and the yield is 60-70%. The invention is applicable to the field of synthesis of medicine compounds.

The invention relates to a method for recovering nickel, cobalt, manganese and iron by roasting and leaching nickel oxide ore. The method includes: ball milling the nickel oxide ore to obtain mineral powder; then adding mineral powder additives into the mineral powder; balling, roasting and conducting leaching processing on roasted mineral materials through water or diluted hydrochloric acid to obtain leaching agent of the nickel oxide ore; adding oxidant into the leaching agent, processing to obtain sediment of cobalt oxide and manganite, adding calcium oxide or sodium hydroxide into filtrate to conduct processing to obtain mixture sediment containing nickel and iron. The method is reasonable in process design and good in operability and can use mineral resource effectively and achieve large-scale industrial production; achieves recycling of four elements of nickel, cobalt, manganese and iron in leaching agent of the nickel oxide; and saves production cost.